It looks like this group hasn't been used in quite a while, so I don't know if this will get any response. I saw one post that said you should walk 30 minutes twice a day. I know everyone's recovery is different, but now I'm in tears. I'm 4 weeks out from surgery, and I too am having to retrain my leg to straighten in the back and bend in the front when I walk. I'm so slow! I'm doing all the exercises, but only once a day, and I'm not walking very much because I'm so frustrated. Apparently, I'd better get on it!